DY WALTER AY. FR0GGATT. 295 



on front margin, broad at tip, costal nervure very stout at base 

 forming a double or secondary costal nervure to stigma; primary 

 stalk short; stalk of subcosta not as long as stalk of cubitus; 

 costal cell short; stigma short, angular; radius short, curving 

 upward, emerging on upper edge of wing; stalk of cubitus long; 

 upper branch straight, upper and lower forks long, curving in at 

 centre and turning outward at tips; lower branch of cubitus long, 

 straight, upper fork long, curving round, lower turning outward 

 at apex; clavus stout, clavical suture slender. Abdomen short, 

 stout. Genitalia (g) long, stout ; lower genital plate short, 

 angular at apex; forceps long, formed of two broad-tipped 

 processes closing down over the penis; upper genital plate slender, 

 conical, truncate at apex, projecting beyond forceps. 



Hob. — Tumut, N.S.W. (on E. polyanthema; W. W. Froggatt). 



Genus Thea, Scott. 



Head twice as broad between eyes as length do.wn centre; 

 crown with posterior margin almost straight, sides straight from 

 base to front of eyes, where they are produced into a short 

 triangular tooth. Face lobes narrow, ribbon-shaped. Antennas 

 long. Eyes on sides of head projecting nearly their whole width 

 beyond pronotum. Thorax : pronotum narrow; mesonotum con- 

 vex, as wide as head and eyes at the insertion of forewings. 

 Elytra elongate, apex acute; stigma short; radius long, terminating 

 at apex; cubitus upper furcation longer than arm, petiole a little 

 longer than lower arm. 



Type Psylla triguttata, Walker. 



Thea formicosa, n.sp. 



(Plate xi , fig. 4). 



Larva dull white, eyes pink, faintly marked with light brown; 

 apex of abdomen darkest, apical segment fringed with hairs. 

 Second stage : Head, thorax, and base of abdomen creamy white; 

 legs, antennae, and wing-covers light brown; eyes dark brown, two 

 large blotches on head dark brown; small, black, angular spots 



